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<p>[QUOTE=&quot;19Lyds, post: 1593106, member: 15929&quot;]The notches you are referring to are the result of die deterioration. (Note to non_cents: The op is referring to the notch on the &quot;inside&quot; of the lower loop in the D and O and not the typical &quot;notch&quot; left from a split serif.)</p><p><br /></p><p>For future reference, these CnClad Kennedy&#039;s are hard and huge. As a result, the minting press took a literal beating pumping these out by the millions. If you beat on these presses long enough, things start getting loose and the eventually machine doubling starts to occur. Machine doubling occurs when the the coin is ejected and bumps into one or both of the die surfaces on its way out of the coining chamber. It is not symmetrical and can occur on a small part of the coin or on the entire coin. I can occur on only the reverse or obverse or it can occur on both surfaced.</p><p>It is ALWAYS flat and shelf like similar to making a mold of something with clay and while the mold is lifted, a slight turn occurs. This is what creates the shelf.</p><p><br /></p><p>The dies also suffered since you can only smash hardened steel into a Copper Nickel (extremely hard) planchet of that size for so long before the die turns to mush!</p><p><br /></p><p>Usually, the fields go away producing a sever orange peel or star burst look. </p><p><br /></p><p><img src="http://i164.photobucket.com/albums/u8/lcl1119/Kennedy/Misc/DSC06836D.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>At that point, the sharp edges of the die have either broken off or been rounded off which produces what looks to be doubling or in the case of the OP&#039;s coin, notching within the lettering. However, this &quot;doubling&quot; usually occurs &quot;around&quot; the device (like a halo or perhaps a letter on top of a larger letter) and is not off to one side of the device (although this can occur as well) such as what would occur during the hubbing process. The end result is distorted lettering or devices which can clearly been seen with well lit magnification.</p><p><br /></p><p>For whatever reason, the CnClad Kennedy&#039;s suffered more severly from die deterioration than the Eisenhower Dollars did as the IKE&#039;s were much larger and physiologically speaking more damaging than the smaller half dollar. Perhaps the sheer size of the IKE made the die deterioration easier to spot? I don;t know. What I DO KNOW, is that machine doubling and die deterioration doubling plagued both of the coins until the US Mint turned down the relief and began experimenting with harder die steel.</p><p><br /></p><p>This is also one of the reasons that 1971 had almost countless doubled dies for both Kennedy&#039;s and Eisenhower Dollars. This phenomenon tapered off up to 1977 with fewer and fewer DD coins being produced.</p><p><br /></p><p>Good Night![/QUOTE]</p><p><br /></p>

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